body {
    margin: 0;
    height: 100vh;
    background-image: url(img/stars.jpeg);
    overflow: hidden;
  }
  .container {
    height: 100%;
  
    padding: 80px 0;
  }
  .row {
    height: 100%;
  }
  .middle-col {
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .solar-system {
    font-size: 6px;
    width: 40em;
    height: 40em;
    /* position: relative; */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  img {
    height: 130%;
    width: 130%;
  }
  .sun-img {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 15em;
    left: 15em;
    width: 10em;
    height: 10em;
    border-radius: 50%;
    box-shadow: 0 0 3em rgb(255, 128, 0);
    animation: orbit 50s linear infinite;
  }
  .sun-img img {
    transition: width 1s ease, height 1s ease;
  }
  .sun-img.big-size img {
    height: 100vh;
    width: 100vh;
  }
  
  .mercury,
  .venus,
  .earth,
  .moon,
  .mars,
  .jupiter,
  .saturn,
  .uranus,
  .neptune,
  .pluto {
    position: absolute;
    border-style: solid;
    border-color: white transparent transparent transparent;
    border-width: 0.1em 0.1em 0 0;
    border-radius: 50%;
  
    color: #fff;
  
    margin-bottom: 10px;
  }
  
  .mercury {
    top: 12.5em;
    left: 12.5em;
    width: 15em;
    height: 15em;
    animation: orbit 68.7s linear infinite;
  }
  .mercury-img {
    width: 2em;
    height: 2em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .venus {
    top: 10em;
    left: 10em;
    width: 20em;
    height: 20em;
    animation: orbit 48.7s linear infinite;
  }
  .venus-img {
    width: 2em;
    height: 2em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .earth {
    top: 6em;
    left: 6em;
    width: 28em;
    height: 28em;
    animation: orbit 36.5s linear infinite;
  }
  .earth-img {
    width: 5em;
    height: 5em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .moon {
    top: 2em;
    right: -1em;
    width: 7em;
    height: 7em;
    animation: orbit 2.7s linear infinite;
  }
  .moon-img {
    width: 3em;
    height: 3em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .mars {
    top: 2em;
    left: 2.5em;
    width: 36em;
    height: 36em;
    animation: orbit 26.5s linear infinite;
  }
  .mars-img {
    width: 3em;
    height: 3em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .jupiter {
    top: -2em;
    left: -2em;
    width: 45em;
    height: 45em;
    animation: orbit 21s linear infinite;
  }
  .jupiter-img {
    width: 5em;
    height: 5em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .saturn {
    top: -7em;
    left: -7em;
    width: 55em;
    height: 55em;
    animation: orbit 17s linear infinite;
  }
  .saturn-img {
    width: 4.5em;
    height: 4.5em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .uranus {
    top: -12em;
    left: -12em;
    width: 65em;
    height: 65em;
    animation: orbit 19s linear infinite;
    -webkit-animation: orbit 19s linear infinite;
  }
  .uranus-img {
    width: 4em;
    height: 4em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .neptune {
    top: -17em;
    left: -17em;
    width: 75em;
    height: 75em;
    animation: orbit 15s linear infinite;
    -webkit-animation: orbit 15s linear infinite;
  }
  .neptune-img {
    width: 4em;
    height: 4em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .pluto {
    top: -22em;
    left: -22em;
    width: 85em;
    height: 85em;
    animation: orbit 18s linear infinite;
  }
  .pluto-img {
    width: 4em;
    height: 4em;
  
    transition: width 0.5s, height 0.5s;
  }
  
  .mercury-img::before,
  .venus-img::before,
  .earth-img::before,
  .moon-img::before,
  .mars-img::before,
  .jupiter-img::before,
  .saturn-img::before,
  .uranus-img::before,
  .neptune-img::before,
  .pluto-img::before {
    content: "";
    position: absolute;
    border-radius: 50%;
    animation: orbit 30s linear infinite;
  
    transition: width 1s ease, height 1s ease;
  }
  .mercury-img::before {
    top: 1.5em;
    right: 0.8em;
    width: 2em;
    height: 2em;
    background-image: url("img/mercury.png");
    background-size: cover;
  }
  .venus-img::before {
    top: 2em;
    right: 2em;
    width: 2em;
    height: 2em;
    background-image: url("img/venus.png");
    background-size: cover;
  }
  .earth-img::before {
    top: 3em;
    right: 0em;
    width: 5em;
    height: 5em;
    background-image: url("img/earth.png");
    background-size: cover;
  }
  
  .moon-img::before {
    top: 0.8em;
    right: 0.2em;
    width: 1.2em;
    height: 1.2em;
    background-image: url("img/moon.png");
    background-size: cover;
  }
  .mars-img::before {
    top: 5em;
    right: 3em;
    width: 3em;
    height: 3em;
    background-image: url("img/mars.png");
    background-size: cover;
  }
  .jupiter-img::before {
    top: 6em;
    right: 3em;
    width: 5em;
    height: 5em;
    background-image: url("img/jupiter.png");
    background-size: cover;
  }
  .saturn-img::before {
    top: 7.5em;
    right: 5em;
    width: 4.5em;
    height: 4.5em;
    background-image: url("img/saturn.png");
    background-size: cover;
  }
  .uranus-img::before {
    top: 9em;
    right: 6.5em;
    width: 4em;
    height: 4em;
    background-image: url("img/uranus.png");
    background-size: cover;
  }
  .neptune-img::before {
    top: 10em;
    right: 8em;
    width: 4em;
    height: 4em;
    background-image: url("img/neptune.png");
    background-size: cover;
  }
  .pluto-img::before {
    top: 11em;
    right: 10em;
    width: 4em;
    height: 4em;
    background-image: url("img/pluto.png");
    background-size: cover;
  }
  
  @keyframes orbit {
    to {
      transform: rotate(360deg);
    }
  }
  
  .popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* خلفية شفافة */
    justify-content: center;
    align-items: center;
  }
  
  .popup-content {
    background-color: white;
    padding: 20px;
    border-radius: 10px;
    max-width: 400px;
    margin: auto;
    position: relative;
  }
  
  .close {
    position: absolute;
    top: 10px;
    right: 20px;
    font-size: 24px;
    cursor: pointer;
    color: #333;
  }
  
  .mercury-img.big-size::before,
  .venus-img.big-size::before,
  .earth-img.big-size::before,
  .moon-img.big-size::before,
  .mars-img.big-size::before,
  .jupiter-img.big-size::before,
  .saturn-img.big-size::before,
  .uranus-img.big-size::before,
  .neptune-img.big-size::before,
  .pluto-img.big-size::before {
    width: 100em;
    height: 100em;
  
    animation: none;
  
    top: 0;
    right: 0;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  
  /* Planets Select */
  .planets-select .form-select {
    background-color: transparent;
    color: #fff;
    font-weight: bold;
    border: solid 2px;
    border-radius: 1px;
  
    text-transform: capitalize;
  }
  
  .planets-select .form-select:focus {
    border: #222;
    outline: 0;
    box-shadow: 0 0 0 0.25rem #ccc;
  }
  
  .planets-select .form-select option {
    background-color: #222;
    color: #fff;
  }
  
  /* Planet Info */
  .planet-info {
    color: #fff;
  }
  
  .modal-dialog {
    position: fixed;
    top: 0px;
    left: 0px;
  }
  .modal-content {
    height: 100%;
    background: transparent;
  }
  .container-img {
    width: 100%;
    height: 40%;
  
    display: flex;
    justify-content: center;
    align-items: center;
  
    margin: 45px 0;
  }
  .container-img .img-pop {
    height: 15em;
    width: 15em;
  }